Update contract-test allowlists for MVP2 endpoints + enum value

[SoundMindsAI]

Summary

Three contract tests assert against hand-maintained allowlists (expected endpoint paths / enum values). MVP2 features added new endpoints and an enum value but didn't update those allowlists, so the tests are stale. This is a clean, low-risk way to learn the contract-test layer.

Fix

Update the allowlists to include the new MVP2 surface (the exact paths/values are enumerated in the idea file's analysis). Run the contract suite to confirm the three failures go green:

make test-contract

Definition of done

• The three previously-failing contract tests pass
• No production code changed — test-data/allowlist updates only
• make test-contract is green

Background

Captured at docs/00_overview/planned_features/02_mvp2/bug_contract_allowlists_outdated_after_mvp2_features/idea.md (lists the exact endpoints + enum value to add).

Good first issue: bounded test-data update; teaches the contract-test layer + API surface contracts.

[SoundMindsAI]

Shipped as part of PR #364 (MVP2 backlog batch) on 2026-06-01. The 3 stale contract-test allowlists got refreshed in that PR; folder finalized post-hoc on 2026-06-02 to docs/00_overview/implemented_features/2026_06_01_bug_contract_allowlists_outdated_after_mvp2_features/ during the MVP2 backlog issue-coverage sweep.